Merge branch 'doc/classifcation.md' into 'develop'

Added limitations of Text-Based Holistic Classification in the classification.md file

See merge request genaiic-reusable-assets/engagement-artifacts/genaiic-idp-accelerator!234

Author: rstrahan

docs/classification.md

@@ -67,6 +67,18 @@ classification:
     </document-text>
   ```
 
+## Limitations of Text-Based Holistic Classification
+
+Despite its strengths in handling full-document context, this method has several limitations:
+
+**Context & Model Constraints:**: 
+- Long documents can exceed the context window of smaller models, resulting in request failure.
+- Lengthy inputs may dilute the model’s focus, leading to inaccurate or inconsistent classifications.
+- Requires high-context models such as Amazon Nova Premier, which supports up to 1 million tokens. Smaller models are not suitable for this method.
+- For more details on supported models and their context limits, refer to the [Amazon Bedrock Supported Models documentation](https://docs.aws.amazon.com/bedrock/latest/userguide/models-supported.html).
+
+**Scalability Challenges**: Not ideal for very large or visually complex document sets. In such cases, the Multi-Modal Page-Level Classification method is more appropriate.
+
 #### MultiModal Page-Level Classification with Few-Shot Examples
 
 - Classifies each page independently using both text and image data